Lesson 7 of 11 12 min
Insurance Basics
Health, auto, and renters insurance; premiums and deductibles.
Written by Mateo LermaLast reviewed 4 sourcesEditorial standards
All lessons in Money After High School
Step 1: The lesson
How do insurance premiums and deductibles work?
Insurance lets you trade a small, predictable cost for protection against a large, unpredictable one.
- Premium: what you pay regularly to have the insurance.
- Deductible: what you pay yourself before insurance starts paying.
- Copay: a flat fee for a service, like $30 for a doctor visit.
- Coinsurance: your share of costs after the deductible, like 20%.
- Out-of-pocket maximum: the most you'll pay in a year for covered care; after that, insurance pays 100%.
Lower premiums usually mean higher deductibles, and vice versa. The right balance depends on how much you could pay if something happened.
Health insurance at 18+
Under the Affordable Care Act, you can generally stay on a parent's health plan until age 26. Employers, colleges, and HealthCare.gov are other options.
Step 2: See it
How a medical bill gets split
For a $5,000 covered bill with a $1,000 deductible and 20% coinsurance: you pay the first $1,000, then 20% of the remaining $4,000, for a total of $1,800. Insurance pays $3,200. Your yearly out-of-pocket maximum caps what you can owe.
$5,000 bill
Covered care
You pay the deductible
$1,000
Then 20% coinsurance
20% of $4,000 = $800
You pay $1,800
Insurance pays $3,200
Step 3: Real-world example
Choosing a plan
Devon, 24, compares two hypothetical health plans from his employer:
- Plan A: $80/month premium, $3,000 deductible.
- Plan B: $180/month premium, $500 deductible.
Plan A costs $1,200 less per year in premiums. If Devon stays healthy, it's cheaper. But if he needs major care, he'd pay up to $2,500 more before coverage kicks in. He picks Plan A and keeps that $2,500 gap in his emergency fund.
Step 4: Knowledge check
Quiz: Insurance Basics (3 questions)
Answer each question, then check your answer to see the explanation. Retake it as many times as you like.
Question 1 of 3
Step 5: Summary
Summary: Insurance Basics
Insurance trades predictable premiums for protection against big costs. Know premiums, deductibles, copays, coinsurance, and out-of-pocket maximums. Lower premiums usually mean higher deductibles. You can generally stay on a parent's health plan until 26, drivers need liability insurance, and renters insurance protects your belongings.
Step 6: What you should remember
Key takeaways: Insurance Basics
- Premium = regular cost. Deductible = you pay first.
- Coinsurance = your share after the deductible.
- Out-of-pocket max caps your yearly costs.
- Parent's health plan until 26 (generally).
- Keep your deductible in your emergency fund.
Key terms in this lesson
Finished the lesson?
Mark it complete to track your progress.
Sources and further reading
Rules, rates, and official figures in this lesson are based on these sources. People and numbers in examples are hypothetical.
- 1.Health Insurance Coverage for Children and Young Adults Under 26 (opens in a new tab)
HealthCare.gov · healthcare.gov
- 2.Deductible (glossary) (opens in a new tab)
HealthCare.gov · healthcare.gov
- 3.Premium (glossary) (opens in a new tab)
HealthCare.gov · healthcare.gov
- 4.Renters Insurance (opens in a new tab)
Insurance Information Institute · iii.org
Last checked September 2026: Staying on a parent's health plan until 26. Rules and numbers like these can change — check the official source before making a decision.
Cite this lesson
Financial Literacy Club. (2026, September). Insurance basics. https://learnwithflc.org/courses/money-after-high-school/insurance
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